Editor 's note : The FBI has one more opening on its list of the Ten Most Wanted Fugitives . Tune into CNN 's `` Campbell Brown '' at 8 p.m. ET Wednesday to find out who fills the final slot .

Alleged cartel hit man Eduardo Ravelo has been added to the FBI 's most wanted list .

EL PASO , Texas -LRB- CNN -RRB- -- Eduardo Ravelo is described as a `` ruthless killer '' who has gone to great lengths to avoid law enforcement while contributing to the bloodshed that terrorizes the border between Texas and Mexico .

Authorities say the suspected hit man with close ties to the Juarez drug cartel has shaved his head , undergone plastic surgery and even manipulated his fingerprints to elude capture .

He heads the Barrio Aztecas gang , but Ravelo is n't flashy , FBI agents say . He keeps a low profile , living modestly .

On Tuesday , Ravelo was named to the FBI 's Ten Most Wanted Fugitives list , taking the second of three vacant slots . Watch the FBI discuss Ravelo 's alleged crimes ''

Officially , he 's wanted on federal racketeering charges , but the FBI says Ravelo 's criminal activities run much deeper . He is believed to be responsible for dozens of murders and assaults , as well as drug trafficking , extortion , weapons offenses and money laundering , FBI Agent Samantha Mikeska said . Watch the latest on Ravelo ''

`` He has no respect for human life , '' she said .

Mikeska is leading the hunt for Ravelo , who goes by the nickname `` Tablas , '' which is Spanish for wooden plank . He 's also called `` Two-by-four '' and is believed to be hiding with his wife and children , probably in a Barrio Aztecas-controlled neighborhood in Juarez , Mexico , just across the border from El Paso , Texas .

`` Eduardo Ravelo rose to power within the Barrio Aztecas criminal enterprise because of his connections with the Juarez cartel and also -LSB- because -RSB- he 's a ruthless killer and will basically carry out what the Juarez cartel wants him to do , '' Mikeska said .

Barrio Aztecas started as a Texas prison gang in the 1980s . Federal authorities say the profits from drug sales are often transferred to the commissary accounts of gang members in prison .

Ravelo came to his position atop the gang violently , the FBI agent said , killing the person whose place he took . His power comes from his close ties to the Juarez cartel . He has spent the past 15 years cultivating relationships with some of the highest-ranking cartel members .

Drug cartel leaders often align themselves with street gangs , employing gang members to carry out some of the cartel 's most vicious work .

U.S. authorities say the commanders of the Juarez cartel often call on Ravelo to execute their enemies . In exchange , Ravelo and his Barrio Aztecas comrades get drugs to sell on the streets of Mexico and the United States .

FBI investigators say they believe that in March 2008 , Ravelo carried out a hit on a captain in his own gang . Mikeska believes Ravelo stabbed him several times and shot him in the neck . Shortly after the murder , he became a Barrio Aztecas `` capo , '' or captain .

In recent years , federal agents have arrested dozens of Barrio Aztecas ' 3,500 members , with six of its leaders sentenced to life in prison .

But Ravelo has eluded authorities . He holds both U.S. and Mexican citizenship , federal authorities say , helping him escape across the border into Mexico with his wife and children .

While he may be staying out of sight , he 's keeping up his violent work , Mikeska says , and he has the resources to do so .

`` He has an entourage , he has bodyguards , he has armored vehicles to protect him from rival gangs and rival cartels , '' Mikeska says .

@highlight

Eduardo Ravelo added to FBI 's Ten Most Wanted Fugitives list

@highlight

FBI says Ravelo may be hiding just across border in Juarez , Mexico

@highlight

Ravelo has undergone plastic surgery , manipulated his fingerprints , authorities say